Underfeed stoker construction



JLl'lle 16, 1931. Q F MiLLER UNDERFEED sToKER CONSTRUCTION Filed Feb. 21, 1930 2 Sheets-Sheet l ATTORNEY June 16, 1931. y c. F. MILLER Y v1,809,906

UNDERFEED STOKER CONSTRUCTION Fit-led Feb. 21, 1930 2 Sheets-Sheet 2 wlTNEss I i I lNvENToR l@ :l N Charles FMiller.

a" @M4/V3 E N ATTORNEY Patented June 16, 1931 i UNIT15:D STATES PATENT" OFFICE CHARLES r. vivrILLnn, or ixro'oans,'.PNNNSvLvANIA,v AssIGNoR :ro wEs'rINqHoUsE lLL'iscfrRIC a MANUFACTURING COMPANY, ACoRroRATION or PENNSYLVANIA UNDERFEED sToKER CONSTRUCTION Application mea mammaryL 21, 193o. seria'lNo. 430,325.y

My invention relates to Astokers and y'more particularly to that type lwhich comprises parallel and alternately-,disposed retorts vand rows oftuyres,and-it has for a broad object to improve the construction and arrangement of thistypfeof apparatus. j f f In certain stokers'of this type, itihas been the practice to support each-side wallot each retort from a separate beam structureand to support the rows of tuyres directly from the upper edges of .the sidewallsof the retorts. t d

l`tion illustrated, git will be observedk that I yhave shown a downwardly-inclined j Aunder- According to a preferred embodiment ofthe present invention, instead of providingfa sep-v arate supporting beamgfo'r eachretort side wall, I provide a beam structure for supporting each two adjacent sidewalls of adjacent retorts. Also, I provide structure for support-v ingv the tuyres independentlyofthe retort side walls, yso thattheside walls may bereplaced without disturbing the t'uyres. rMore particularly, therefore, a further object of my invention is to Aprovide a4 multiple retort stolerk wherein the retorts are', supported in this way andA wherein the tuyresf are supported independently of the retort side walls.

A further obj ect of my invention is to provide,-in a multiple retort underfeed Stoker, a structural frame work for *supporting` Cast iron, fuel-contacting parts and including L beams disposed beneath the-tuyre rowsand -having elements secures thereto forfsupporting adjacent retort. sidefwallsland for sup? porting the tuyeres independently of the re-f `tort side walls. f v ,t

Y These andother objects `are .-etfected by my i1 invention, ,as will be apparent from thelfol-` 'lowingdescription and claims,otaken in conv nection with thev accompanying drawings,

`forming Aa part of this application, in which:

- Fig;Y 1 is a longitudinal sectionalview `illustrating a multiple retort underfeed Stoker constructed in accordance with 'my invention',

the view being taken on the line I-I of Fig.. 2 is .a atrafgrlrltary plan view @fills apparatus shown inv Fig.l 1, certain partsbe- ,ing removed to illustrate the details of construction; 4 y *l rFignisan enlarged ragmentary sectional view taken on the line III-,III of Figo-.1;

yand, y" y I Fig."4 isfa; fragmentary' sectional view taken on-the line IV-#IV:of,Fig.1, and illusf trat-ing `the construction at the lower end 'of thestolrers f Y A t Referring know indetail toe-the construcposed betweenthe side wallsfand supported by brackets 'l5 carried by flanges 16 extendf' inglaterally from -the `lower, edges of the retort side walls. vTheadj acent ends of the sections13 are detachably secured together by clampingJ yplates 17 kandvbolts; 18 passing through the platesgand the sections, 'The 4tuyrefs `11V are' disposedin overlapping relation and formr atcover for the space between .the t adjacent side walls of adjacentk retorts.

w'Iheretorts and the tuyres form the uel supporting surfaces for the "Stoker andr are supported by Vframe structure disposed there-V gbeneath; l vThe `frame structure includes .par-

allel--vI-beams 20 ,carriedy at their upper and lower ends by castings 21 and 22,'respectively, which 4rlatter are in turn supported bylupper,- and lower transversely-extendingy I- ;beams 23 yand 24, respectively.- The casting .Zlisbolted (tothe beam 23. The casting22,

however, is slidable on the beam 24 to permit longitudinal expansion ofthe Stoker. The

arrangement ot theffI-beams 20cis such that .thereisone beam disposed betweenthe two adjacent side walls ofadjacent retorts and directly bneaththe tuyres losingthe space between Such ,Side WallsY f One or more frame-like castings 25 are supported by the upper flange of each of the I- eams and comprise a bottom plate 26 bolted to such flange of the I-beam, a pair of side pieces 27 disposed parallel and adjacent to the retort side walls and cross members 28 connecting the side pieces with the bottom plate 26.

The retort side walls 12 are secured at their upper ed e to the adjacent side pieces 27 by means of olts 80 extending through the side walls and through boss-like extensions 31, formed on the walls and through the side piece. The lower ortions of the side walls 12 are provided with additional extensions 32. The extensions 32 engage at their outer ends the lower flange of the I-beam and thereby provide a means for holding the lower portion of the retort side -walls in proper position.

The tuyres'll are supported independently of the retort -side walls. The tuyeres rest upon the upper surface of the side pieces 27 and are provided with lugs 33 which cooperate with lugs 34 formed on the outer sides of the side pieces 27, to hold the tuyres in proper spaced relation. As an additional means of holding the tuyres in proper position, they are each provided with a downwardly-extending projection 35 and a slot 36, the projection 35 of one tuyre fitting within the slot 36 in the tuyre immediately below.

From the'foregoing, it will be seen that I vhave rovided a supporting frame construction or a multiple retort underfeed stoker wherein the tuyres are carried independently of the retort side walls, this mode of supporting being advantageous from the points of View of relative expansion and vcontraction of the cast iron elements and of making it possible to replace the retort side walls without disturbing the tuyres. Furthermore, as the principal supporting elements are I- beams, my construction has the advantage of using a very desirabletype of beam structure on account of strength, straightness, and independence of design from the retort side walls. Also, the brackets for supporting the retort side walls serve to prevent overheating of the beam structures andV they provide a kconvenient means for securing alignment of the sections of the retort side walls. Not only may beams of the most desirable ldesign be used when located in this way, but they serve the double purpose of supporting the retort side walls and the tuyres.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the pridr art or as are specificallyset orth in the appended claims.

1. In an underfeed stoker having alternately-arranged retorts and tuyre rows, a supporting construction for the stoker including a beam arranged below each tuyre row and connected to adjoining side walls of adjacent retorts, and means connected to each beam for supporting the tuyres of the row thereabove independently of the retort side walls.

2. In Stoker apapratus, the combination of a combustion grate comprising a plurality of spaced parallel retorts and a row of tuyres closing the space between the retorts; each of the retorts comprising side walls formed of sections and bottom-forming members disposed between the side walls; a supoprting frame for the Vcombustion grate comprising a plurality of spaced beam structures disposed parallel to and alternate with respect to the retorts; means for detachably supporting the two adjacent side walls of adjacent retorts to their respective beam structure; and means other than the retort walls for detachably supporting the tuyres from the beam structure.

3. In stoker apparatus, the combination of a plurality of spaced parallel retorts, each ofwhich comprises side walls formed of sections and bottom-forming members disposed between the side walls; a row of tuyres closing the space between adjacent retorts; a plurality of parallel beam structures for supporting the retorts, there being one beam structure for each two adjacent side walls of adjacent retorts means for detachably securing the sections forming the two adjacent side walls of adjacent retorts to their respective beam structure.; and means other than the retort Walls for detachably supporting the tuyres from the adjacent beam structure.

4. In stoker apparatus, the combination of a plurality of spaced parallel retorts each of which comprises side walls formed of sections and bottom-forming members disposed between the side walls; a row of tuyres closing the s ace between adjacent retorts; a plurality o parallel beam structures for supporting the retorts, there being one beam structure for each two adjacent side walls of adjacent retorts; means for detachably securing the sections forming the two adjacent side walls of adjacent retorts to their respective beam structure and including means other than the retort side walls for supporting the tuyres from such beam structure.

5. In stoker apparatus, the combination of a plurality of spaced parallel retorts each of which comprises side walls formed of sections and bottom-forming members disposed between the side Walls; a row of tuyres closing the space between adjacent retorts; a plurality o parallel beam structures for supporting the retorts, there being one vbeam structure for each two adjacent side walls of `scribed my name this 17th day'of February,

CHARLES F. MILLER. Y 

